[PATCH v2] net/af_packet: support Tx scattered mbuf input
From: Wenfeng Liu <hidden>
Date: 2017-08-07 09:10:23
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Signed-off-by: Wenfeng Liu <redacted> --- v2: * Fixed coding style issues reported by checkpatch drivers/net/af_packet/rte_eth_af_packet.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/net/af_packet/rte_eth_af_packet.c b/drivers/net/af_packet/rte_eth_af_packet.c
index 9a47852..fabb915 100644
--- a/drivers/net/af_packet/rte_eth_af_packet.c
+++ b/drivers/net/af_packet/rte_eth_af_packet.c@@ -216,7 +216,7 @@ struct pmd_internals { mbuf = *bufs++; /* drop oversized packets */ - if (rte_pktmbuf_data_len(mbuf) > pkt_q->frame_data_size) { + if (mbuf->pkt_len > pkt_q->frame_data_size) { rte_pktmbuf_free(mbuf); continue; }
@@ -237,8 +237,17 @@ struct pmd_internals { /* copy the tx frame data */ pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN - sizeof(struct sockaddr_ll); - memcpy(pbuf, rte_pktmbuf_mtod(mbuf, void*), rte_pktmbuf_data_len(mbuf)); - ppd->tp_len = ppd->tp_snaplen = rte_pktmbuf_data_len(mbuf); + + struct rte_mbuf *tmp_mbuf = mbuf; + while (tmp_mbuf) { + uint16_t data_len = rte_pktmbuf_data_len(tmp_mbuf); + memcpy(pbuf, rte_pktmbuf_mtod(tmp_mbuf, void*), data_len); + pbuf += data_len; + tmp_mbuf = tmp_mbuf->next; + } + + ppd->tp_len = mbuf->pkt_len; + ppd->tp_snaplen = mbuf->pkt_len; /* release incoming frame and advance ring buffer */ ppd->tp_status = TP_STATUS_SEND_REQUEST;
--
1.8.3.1